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Finding the Fourth Proportional to 543,336.40, 815,782.20 and 307,140.40

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Solution

The fourth proportional to 543,336.40, 815,782.20 and 307,140.40 is: 461,150.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,336.40 : 815,782.20 = 307,140.40 : x
  2. Step 2: Convert to fraction form
    543,336.40/815,782.20 = 307,140.40/x
  3. Step 3: Cross multiply
    543,336.40x = 815,782.20 × 307,140.40
  4. Step 4: Simplify right side
    543,336.40x = 250,559,671,220.88
  5. Step 5: Solve for x
    x = 250,559,671,220.88/543,336.40
  6. Step 6: Final answer
    x = 461,150.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.